Tc-migration in advection/diffusion controlled natural systems: Influence of ferrous iron pool

The Tc(VII) interaction with crystalline rock materials from the generic underground research laboratory in Sweden (Äspö Hard Rock Laboratory) and from a prospective site of nuclear waste disposal in Russia (Nizhnekansky massif) was investigated. The main focus of this work is laid on the effect of Fe(II) content in the mineral phase or rock, which is considered as the dominating redox partner for Tc(VII) reduction under far-field conditions in crystalline rock.